“…The workers who studied the reduction of iron(III) by aluminum as a method for iron determination (1-4, 11, 12) did not report values for efficiency of reduction. The attainment of 100% efficiency when aluminum powder is reacted with a large excess of iron(III) has been reported (10). The powder used in this wrork had a metal content of 94 to 97% by the method of Light and Russell (10).…”